<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>注册</title>
    <link rel="stylesheet" href="css/common.css">
    <link rel="stylesheet" href="css/login.css">
</head>
<body>
<!-- 导航栏 -->
<div class="nav">
    语伴
</div>
<!-- 主窗口区 -->
<div class="login-container">
    <div class="login-dialog">
        <h3>注册</h3>
        <div class="row">
            <span>用户名</span>
            <input type="text" id="username">
        </div>
        <div class="row">
            <span>密码</span>
            <input type="password" id="password">
        </div>
        <div class="row">
            <button id="submit">注册</button>
        </div>
    </div>
</div>

<!-- 引入 jquery -->
<script src="https://code.jquery.com/jquery-4.0.0-rc.1.js"></script>
<!-- 实现前后端交互 -->
<script>
    let submitButton = document.querySelector('#submit');
    submitButton.onclick = function() {
        // 1. 获取到用户输入的用户名和密码
        let username = document.querySelector('#username').value;
        let password = document.querySelector('#password').value;
        if (username == '' || password == '') {
            alert('您输入的用户名或密码为空!');
            return;
        }

        // 2. 发送 ajax 请求
        $.ajax({
            type: 'post',
            url: 'register',
            data: {
                username: username,
                password: password
            },
            success: function(body) {
                if (body && body.userId > 0) {
                    alert('注册成功!');
                    location.assign('/login.html');
                } else {
                    alert('注册失败!');
                }
            }
        });
    }
</script>
</body>
</html>